Function isValidHex

Validates whether a given string is a valid hexadecimal color code. The function ensures that the input string matches the format of either a 3, 6, or 8-digit hexadecimal number, optionally prefixed with a #.

Example

console.log(isValidHex('#ff0000')); // true
console.log(isValidHex('ff0000'));  // true
console.log(isValidHex('#FFF'));    // true
console.log(isValidHex('FFF'));     // true
console.log(isValidHex('#12345678')); // true
console.log(isValidHex('12345678'));  // true
console.log(isValidHex('#12345'));   // false
console.log(isValidHex('#gggggg'));  // false
console.log(isValidHex(null));       // false
console.log(isValidHex(123 as any)); // false
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Remarks

The isValidHex function is used in various scenarios where hexadecimal color validation is needed, such as in functions like hexToBinary and hexToRgba. It ensures that only valid hexadecimal color codes are processed, preventing errors and unexpected behavior.